Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 448
of the experimenter or through a connectingwire uniting the two screw-cups to the fourth cup adjacent to the electro-magnet, from whence it com-pletes its circuit to the exciting battery. By this arrangement the electric shocks are propagatedfrom the same wire which transmits the primary current.… … 440 ELECTRICITY. onsly drawn down in contact with the poles adjacent thereto, depressing the flexible steel spring from itspressure and contact with the point of the screw S. Its contact therewith is thus broken ; and conse-quently, the further circulation of the electric current about the wire…
Mechanical engineering
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